Concrete mixer



April 22 1924. 1,490,952

- G. w. ADAMS CONCRETE MIXER Filed March 15. 1%23 2 Sheets-Sheet 1 WITNESSES i0 INVENTUR WZVKVEu/M (2e or c .Wfldanw momvm April 22 1924. 1,490,952

G. w. ADAMS CONCRETE MIXER Filed March 15; 1923 2 Sheets-Shet. 2

arm g6 ATTORNEYS WITNESSES 9 Patented Apr. 22, 11924;

FF 1 ii;

P A T N CONCRETE MIXER.

Application filed March 15, 1923. Serial No. 625,405.

To (ZZZ whom it may concern.

Be it known that I. Gnonon W. .ADAMs, a citizen of the United States, and resident of San Antonio, in the county of Bexar and. State of Texas, have invented certain new and useful Improvements in Concrete Mixers, of which the following is a specification.

The present invention relates to improvements in concrete mixers of the type disclosed in Letters Patent of the United States, No. 1,454,370, granted to me May 8th, 1923, and it consists in the combinations, constructions and arrangements herein described and claimed.

An object of the present invention is to provide a concrete mixer including an oscillatory drum or receptacle having a novel arrangement of mixing or agitator elements disposed therein, whereby an improved mixing action will be obtained when the receptacle is oscillated.

Other objects and advantages will be apparent from the following description, considered in conjunction with the accompanying drawings, in which- Figure 1 is a side elevation of the improved concrete mixer.

Figure 2 is a perspective view of the mixer, looking at the front side thereof,

Figure 3 is a vertical longitudinal central section through the mixer, and

Figure 4 is a transverse vertical central section through the mixer.

Referring now to the drawings, it will be observed that I provide a receptacle 1 which comprises a substantially pear-shaped body formed to provide a bottom 2, parallel substantially straight sides 33 and ends 1 and 5 respectively. The ended and 5 are curved and divergent from the bottom 2 for approximately one-third their length the remaining; portion of the ends converginp; toward their upper ends so as to provide a mouth 6. The specific receptacle shown in the drawing is described in detail in my aforesaid patent and a further description thereof herein is deemed unnecessary.

The receptacle 1 is mounted to swing about the horizontal aligned axes of trunnions or journal pins 7-7 which are carried by upstanding supports 8-8 which in turn are secured and stayed to a frame 9, the trunnions or journal pins being received in horizontally aligned openings through the side walls of the receptacle. The mouth 6 is normally disposed above the plane of the journal pins 7-7 of the receptacle. The frame 9 preferably is supported at one end upon ground wheels 10 and rests at its other to end upon legs 11 or the like so that the frame with the receptacle mounted thereon may be moved "from place to place, as desired.

Platform members 35 extending longi- 6 tudinally of the frame 9 at opposite sides thereof are. swingingly attached to the frame 9 by strap hinges 36 and are held against swinging movement downwardly below a horizontal plane by flexible connecting memhere, such as the chains 37 which extend between the outer edges of the platform members and the upright supports 8-8, being so arranged as to be taut when the platform members are in horizontal planes. Apertures 38 in the platform memhere 35 are adapted to serve as hand-holds when it is desired to move the device as a unit. Hand-hold 39 on the front portion of the frame 9 provides a convenient means 8 adapted to be grasped to raise the front portion of the frame when it is desired to move the device on the wheels 10.

The receptacle 1 is provided with a pair of operating handles 12 which are secured at their lower ends to the sides 33 in any suitable known manner at the end 01 the receptacle defined by the end wall 5 and which extendsfrom the upper end or mouth of the receptacle in position to be grasped so when it is desired to swing the receptacle from the position indicated by the full lines in Figure 3 to either one of the positions indicated by dotted lines in Figure 3 or vice versa. The end 1 is the charging end of the device and the end wall t is formed to extend into the neck portion of the receptacle adjacent to the mouth 6, as indi cated at 13, thus providing in the outer wall of the end 4 a seat for the upper ends of supporting and bumper members 14 which are upstanding from the frame 9.

A pair of spaced vertical gratings 15 is arranged within the receptacle 1 between the side walls 3-3 of the receptacle in the embodiment of the present invention as in the case of the receptacle disclosed in my aforesaid prior application. Similar mixing blades 16 and 17. respectively carried by the end walls 1 and 5 and pairs of auxno iliary mixing and deflecting blades or vanes 1.8-4.8 and 19--l9 respectively" cooperate with each other and with the gratings 15 to effect a highly effective mixing action on concrete ingredients within the receptacle when the latter is operated. The mixing blade 16 is substantially til-shaped and is supported at an appreciable distance from the end wall a by a plurality of spaced apart brackets 20 so that the open side of the blade will be disposed up aermost. The supporting brackets 20 are secured to the end wall a and in addition to functioning as supports tend to break up and mix concrete ingredients passing between the inner ends of the blades 16 and the end wall of the re ceptacle. l prefer to employ five of the brackets 2-0 for the blade 16 although obviously a greater or less number may be used without departing from the spirit and scope of the invention.

The blades 18-48 likewise are carried by the end wall l being supported in spaced relation to the latter by means of a plurality of spaced apart brackets 21 so that the re spect-ive blades 18-18 are disposed. at opposite sides of' the mixing blade 16 and at appreciable distances from the side walls of the receptacle. The blades 1.818 comprise fiat sheets or strips extending substantially in parallel relation to the side walls of the receptacle from their lower ends to points approximately midway of their length and then being curved upwardly and inwardly substantially along the arc of circle so that the extreme upper end portions thereof are relatively adjacent to each other and are disposed above the open side of the mixing blade 16, being tangent at their upper ends to a horizontal plane extending through the receptacle above the horizontal medial line of the latter.

The blade 17 is similar in conformation to the blade 16 and is supported on the end wall 5 in a position corresponding to that oi. the blade 16 on the end wall 4- and substantially in alignment with the blade 16. Piracl'; 22 similar to the brackets QO'and functioning in the same manner as the latter are employed to attach the blade 17 to the wall 5, The blade 17 is flanked by the end portions of the blades 1919 are supported in spaced relation to the side walls and to the end wall 5 by brackets 23. sim lar .to the brackets 21. r1 1 Que blades 1919 have the form best seen in Figure 2.

I the. lower end portion thereof substantially straight and parallel h the side walls 3 S, the intermediate portions thereof being curved inwardly to overlie the open side of the blade 17 as indicated at 19" and the upper end portion thereof being curved upwardly and outwardly in r'" set to the cur ed portion 19 so that the blades 19 -19 diverse slightly their upper ends as indicated at 19 and are received within a pouring spout 24b The ineonee latter is attached by brackets 25 to the inner wall of the end 5 and extends from the in terior of the receptacle to the mouth 6.

From the foregoing description of the various parts of the device, the operation vertical dotted line position of Figure 3, U

the concrete ingredients will be thrown out of the blade 16 and outwardly from the vanes 18 through the gratings 15 and will be deflected by the vanes 19 into and about the blade 1?. When the receptacle is oscillated the concrete ingredients will be thrown back and forth between the blades 17 and 16 and the charge will thus be thoroughly broken up and the ingredients thereof intin'iate ly commingled. When the ingredients have been thoroughly mixed, the receptacle is swung to the downwardly inclined dotted line position of Figure 3 and the mixture will be guided by the blades or vanes 19 into the pouring spout 24c and will therefrom by gravity LO a desirable p ace, as for instance to the surface on which the concrete mixture is to be placed. Since the blades 16 and 17 and tie blades or vanes 1818 and 1919 are supported in spaced relation to the adjacent walls of the receptacle, the concrete ingredients may pass between the inner edges of such blades or vanes and the inner walls of the receptacle, permitting of a relatively great movement of the concrete ingredients within the receptacle during the mixing operation and thus insuring thorough and complete disintegration of the introduced charge and thorough mixing of the ingredients of. the charge. The brackets which support the vanes and blades on the inner walls of the receptacle aid in lr'eaking up the charge luring the operation of the device.

Foot rests 26 and 27 respectively are provided in spaced apart relation, the foot rest 26 being carried by a supporting bar 28 secured at one end to one of the bumpers 14 and at its other end to an inclined brace 29 for one of the standards 8, while the foot rest 27 is carried by an angular support 30 which is attached at one end on the frame 9 and at its other end to one of the standards 8. These foot rests may be used successively during the operation of oscillating the receptacle. When the latter has been tilted to charging position, as illustrated in the full lines in Figs. 1 and 3, the operator may stand at one side of the receptacle with his foot which is proximate to the receptacle resting upon one of the platform members 35 and with his other foot braced against the foot rest 26. The adjacent handle 12 may then be graspedconveniently by both the hands of the operator and the receptacle swung until it has been tilted toward the discharging position. To conveniently effect return movement of the receptacle, the operator reverses his position on the platform members so that his foot which is farthest from the receptacle may be braced against the foot rest 27 while the adjacent handle 12 grasped in both hands. It thus will be apparent that a relatively great pull on the receptacle may be exerted when the recep' tacle is any of the positions to which it may be swung during its oscillation without any appreciable fatigue to the operator as the resultant stresses on the muscles of the body of the operator will be distributed to the muscles of his entire body.

The foot rests 26 and 27 may be placed on both sides of the receptacle so that two operators may be employed simultaneously in effecting oscillation of the receptacle.

Obviously, my invention is susceptible of embodiment in forms other than that illustrated in the accompanying drawings and I therefore consider as my own all modifications and adaptations ofthe form of device herein shown which fairly fall within the scope of the appended claims.

Having thus described the invention, what I claim is 1. In a device of the character described, a receptacle comprising a hollow body open at its upper end, an arcuately curved mixing blade supported upon an inner wall of the body, and other mixing blades flanking the first mixing blade, said flanking blades each having a concave wall facing said first mentioned mixing blade.

2. In a device of the character described, a receptacle comprising a hollow body open at its upper end and closed at its lower end, a curved mixing blade supported within the receptacle with the open side of the blade uppermost, and a pair of additional mixing blades associated with the first mixing blade, the respective second named mixing blades being substantially vertically disposed and supported at opposite sides of the first mixing blade, said additional blades each having a concave wall facing the first mentioned blade.

3. In a device of the character described, a receptacle comprising a hollow body closed at its lower end and open at its upper end, a mixing blade of arcuate cross sectional contour supported within the receptacle body on an inner wall of the latter and in spaced relation thereto, similar vanes supported on the inner wall of the receptacle body in flanking relation to the mixing blade, and in spaced relation to the latter,

said vanes being curved toward their upper ends to partially overlie the open upper side of the mixing blade.

4-. In a device of the character described, a receptacle comprising a hollow body closed at its lower end and open at'its upper end, a mixing blade of arcuate cross sectional contour supported within the receptacle body on an inner wall of the latter and in spaced relation thereto, similar vanes supported on the inner wall of the receptacle body in flanking relation to the mixing blade, and in spaced relation to the latter, said vanes being curved toward their upper ends to partially overlie the open upper side of the mixing blade, said vanes being spaced. from the innn er wall of the receptacle body. 5. In a device of the character described, a receptacle comprising a hollow body closed at its lower end and provided at its upper end with an opening of relatively restricted area, curved mixing blades supported within the receptacle on opposite walls thereof, each of said mixing blades being arcuate in cross sectional contour and being arranged with the open side thereof uppermost, and a pair of vanes associated with each of said mixing blades, the respective vanes of each pair being arranged in flanking relation to the mixing blade with which associated and extending above the level of the mixing blade.

6. In a device of the character described, a receptacle comprising a hollow body closed at its lower end and provided at its upper end with an opening of relatively restricted area, curved mixing blades supported within the receptacle on opposite walls thereof, each of said mixing blades being arcuate in cross sectional contour and being arranged with the open side thereof uppermost, and a pair of vanes associated with each of said mixing blades, the respective vanes of each pair being arranged in flanking relation to the mix ing blade with which associated and extending above the level of the mixing blade in spaced relation to the latter and to the inner wall of the receptacle body.

7. In a device of the character described, a receptacle comprising a hollow body closed at its lower end and provided at its upper end with an opening of relatively restricted area, curved mixing blades supported within the receptacle on opposite walls thereof, each of said mixing blades being arcuate in cross sectional contour and being arranged with the open side thereof uppermost, and a pair of vanes associated with each of said mixing blades, the respective vanes of each pair being arranged in flanking relation to the mixing blade with which associated and extending above the level of the mixing blade in spaced relation to the latter and to the inner wall of the receptacle body, the vanes of one pair extending vertically from their lower ends for part of their length and then being curved upwardly and inwardly to partially overlie the mixing blade with which they are associated and the vanes supported on the opposite wall of the receptacle extending vertically from their lower ends for part oi their length, then being curved upwardly and inwardly into overlying relation to the mixing blade with which they are associated and then being curved upward and out-- wardly to diverge at their upper extremities.

8. In a device of the character described-t a receptacle comprising a hollow body closed at its lower end and provided at its upper end with an opening of relatively restricted naeaaaa area, curved mixing blades supported within the receptacle on opposite walls thereof, each of said mixing blades being arcuate in cross sectional contour and being arranged with the open side thereof uppermost, a pair of vanes associated with each of said mixing blades, the respective vanes of each pair being arranged in flanking relation to the mixing blade with which associated and extending above the level of the mixing blade, and a pair of spaced mixing gratings supported within the receptacle body between said opposite inner walls and the blades and vanes thereon.

GEORGE WASHINGTON ADAMS. 

